Topwrap apparatus



April 29, 1969 J. HARRISON 3,

TOPWRAP APPARATUS Filed June 2. 1966 Sheet of 4 J4 J5 16 46' 20 22 971 960 30 L J/VWEWHIR James A arius'wz 12 Bzair Buckles 2Q @6506 111' TOR/VF6.

April 29, 1969 J. HARRISVON 3,440,796

TOPWRAP APPARATUS Filed June 2, 1966 Sheet 2 of 4 April 29, 1969 .J.HARRISON TOPWRAP APPARATUS Sheet Filed June 2, 1966 April 29, 1969 J.HARRISON TOPWRAP APPARATUS QINNK KWQQQKR United States Patent Oflice3,440,796 Patented Apr. 29, 1969 U.S. CI. 53-74 9 Claims ABSTRACT OF THEDISCLOSURE The disclosed apparatus produces individual topwrap sheetsfrom a continuous roll of Wrapper material and places the sheets onbundles such as a stack of newspapers, magazines or the like in acontinuous operation. Wrapper material is fed from a roll through acutter and into position on a pair of support bars over a bundleconveyor. A reciprocable placement plate temporarily deforms and carrieseach cut topwrap sheet down through the support bars and places it on abundle top. The apparatus is controlled electrically by a controlmechanism which provides for sequential operation of the variousfunctions of the apparatus and for predetermined delays between thefunctions. Means are also provided to prevent the apparatus fromrecycling before a previous cycle is completed.

In the bundling of stacked newspapers or magazines, sheets of protectivematerial such as paper or plastic are placed on the upper and lowersurfaces of the bundle. These sheets, respectively called topwrap andunderwrap sheets, protect the outermost copies of the newspapers ormagazines from the elements, and minimize damage due to abrasionresulting from loading or unloading.

Prior art topwrap machines, such as the one illustrated in my UnitedStates Patent No. 3,026,659, require the use of pre-cut topwrap sheets.The use of such sheets entails the added expense of pre-cutting to sizeand stacking for use in the machine. The heavy stack of pre-cut topwrapsheets makes loading ditfieult and a complex feed mechanism is requiredto raise and position sheets for placement on the top surface of abundle. The stacked sheets also have a tendency to stick together,further complicating the process of feeding them into position forplacement on the bundle.

I have now found that the above problems, among others, are eliminatedin my present topwrap apparatus which uses a continuous roll of wrappermaterial rather than pre-cut sheets, and which produces individualtopwrap sheets from the roll as required.

Accordingly, an object of the present invention is to provide a topwrapapparatus which produces individual topwrap sheets as required from acontinuous roll of wrapper material.

Another object of the invention is to provide an apparatus of the abovecharacter in which topwrap sheets are supported at their edges inposition for placement on a bundle by an inexpensive pair of supportbars.

Another object of the invention is to provide an apparatus of the abovecharacter which places topwrap sheets on bundles in a continuousoperation.

A further object of the invention is to provide an apparatus of theabove character which is electrically controlled through a predeterminedcycle.

Another object of the invention is to provide an apparatus of the abovecharacter in which loading of wrapper material can be done easily andexpeditiously,

A further object of the invention is to provide an apparatus of theabove character which automatically addresses or labels a topwrap sheetbefore placing it on a bundle.

A still further object of the invention is to provide apparatus of theabove character which is simple in construction and reliable andpractical in operation.

Other objects of the invention will in part be obvious and will in partappear hereinafter.

The invention accordingly comprises the features of construction,combinations of elements, and arrangement of parts which will beexemplified in the constructions hereinafter set forth, and the scope ofthe invention will be indicated in the claims.

For a fuller understanding of the nature and objects of the invention,reference should be had to the following detailed description, taken inconnection with the accompanying drawings, in which:

FIGURE 1 is a top plan view of the topwrap apparatus of the presentinvention with portions of the superstructure cut away to reveal theworkings thereof;

FIGURE 2 is a side elevation view of the topwrap apparatus, partly insection, taken along the line 22 of FIGURE 1;

FIGURE 3 is an enlarged partial sectional view of a portion of theapparatus taken along the line 33 of FIGURE 1;

FIGURE 4 is a partial sectional view of the placement plate assembly ofmy topwrap apparatus taken along the line 4-4 of FIGURE 3;

FIGURE 5 is a greatly enlarged perspective view, partially cut away, ofthe placement plate together with a portion of its supporting assembly;

FIGURE 6 is an enlarged partial top plan view of an embodiment of theapparatus which includes a labelling or addressing mechanism;

FIGURE 7 is a partial sectional view of a portion of the apparatus takenalong the line 77 of FIGURE 6;

FIGURE 8 is a partial sectional view of a portion of theh apparatustaken along the line 88 of FIGURE 7;

FIGURE 9 is a schematic representation of the electrical controlcircuitry for the apparatus of the invention.

Similar reference characters refer to similar parts throughout theseveral views of the drawings.

Generally and with reference to FIGURES 1 and 2, the topwrap apparatusof the present invention produces individual topwrap sheets from acontinuous roll of wrapper material, and places the sheets on bundlesmoving continuously along a conveyor. It comprises a feed roll loadingmechanism shown generally at 10 including a loading ramp 12, guideflanges 14, and roll supports 16 upon which is mounted a feed roll 18 ofpaper or other suitable wrapper material. A continuous strip 20 ofwrapper material is fed from feed roll 18 by means of a power roll 22 toa pair of support bars 24a, 24b positioned above a conveyor 26. A papercutter shown generally at 28 is :actuated to sever the strip 20 into atopwrap sheet 30 of desired length when a bundle 32 moving alongconveyor 26 intersects the light beam reaching photocell 34. Oncesevered, the sheet 30 is held in position over bundle 32 only by thesupport bars 24a, 24b. Substantially simultaneously with the severanceof sheet 30, an air cylinder 36 is actuated to move pistOn 38 and theattached placement plate 40 downward between and through support bars24a, 24b, carrying topwrap sheet 30 to its intended position atop bundle32. The placement plate assembly 42 then retracts and the cycle repeatsas another bundle moves into position on conveyor 26. The cycle of themachine is electrically controlled by a control circuit shownschematically in FIGURE 9.

More specifically, the roll of wrapper material 18 is supported by itsaxle 44 in a pair of roll supports 16 secured to the sidewall of rollcompartment 48. The loading of roll 18 is accomplished by lowering ramp12 as shown by the dashed lines in FIGURES 1 and 2. The roll of wrapper18 is rolled up lowered ramp 12 until axle 44 is rollingly supported bythe guide flanges 14. By closing ramp 12, roll 18 is pushed and rollsover guide flanges 14 into position on roll supports 16 inside rollcompartment 48.

The wrapper strip 20 is threaded around a guide roll 50 with a loopextending down between tensioning bar guide rails 52. A tensioning bar54 is loosely inserted in the guide rails 52 through the loop where itcan reciprocate vertically in response to the sudden pull of power roll22. Thus, there is an accumulation of slack in strip 20 which minimizesthe danger of tearing due to the sudden pull of power roll 22. The strip20 is fed between the power roll 22 (which is driven by a feed motorshown in FIG- URE 9) and a follower roll 56. Both the power roll 22 andthe follower roll 56 are journalled to the apparatus frame. The powerroll 22 is actuated intermittently, in a manner more fully describedhereinafter, to extend a length of strip 20 over a pair of support bars24a, 24b which are positioned on an extension 58 of the apparatus frame.

A paper cutter 28 is secured to frame extension 58 in position to severstrip 20 into topwrap sheet having a desired length (FIGURES 2 and 3).The cutter comprises a pair of solenoids 60 secured to frame extension58 which actuate the attached slotted rubber bumper 62 positioned aboveand extending transversely across the path of strip feed. While asolenoid controlled cutter is shown, it will be understood that othertypes, such as a pneumatically controlled cutter, may also be used. Apair of spring loaded rubber cheeks 64 are positioned below and extendtransversely across the path of strip feed and surround a transverselypositioned blade 66. When the cutter 28 is actuated, the bumper 62depresses the cheeks 64, exposing blade 66 to cut sheet 20.

The placement plate assembly 42 of the topwrap apparatus (FIGURES 2, 3,and 4) is fastened to a frame cross bar 68, and is positioned directlyabove and symmetrically centered between support bars 24a, 24b. Theassembly 42 comprises a pneumatic cylinder 36 secured to cross bar 68which encloses a reciprocal piston 38 terminating at its lower end inplacement plate 40 (FIG. 5). The reciprocation of piston 38 is effectedby the alternate passage of air or other fluid through valves 69a and 6%which are alternately opened and closed by a valve solenoid (FIG. 9). Apair of bracing rods 70 (FIG. 3) are attached to placement plate 40 andextend axially along either side of the pneumatic cylinder 36. The rods70 are slidably retained in guide holes 72 extending through cross bar68. The support bars 24a, 24b are fastened to frame extension 58parallel to its longitudinal axis, and are spaced apart somewhat lessthan the width of the severed topwrap sheet 30 so that it is supportedby its edges thereon (FIGURES 3 and 4). A simple and inexpensive pair ofsupport bars 24a, 24b are thus all that is required to hold and positionthe severed topwrap sheet for placement on a bundle 32 moving alongconveyor 26. The width of placement plate 40 is slightly less than theseparation of support bars 24a, 24b so 4 that it temporarily deformstopwrap sheet 30 and readily carries it between bars 24a, 24b as shownin FIGURE 4.

A plurality of apertures 74 and perforations 76 (FIG- URE 5) areprovided in placement plate 40 to prevent the formation of a vacuumbetween it and topwrap sheet 30, thereby facilitating separation afterplacement on the bundle 32.

As shown in FIGURES 2 and 3, a photoelectric cell 34 is suspended fromframe extension 58 by a rod 78 fastended to bracket 80. A light source82 is secured to the apparatus frame in registry with the photoelectriccell. The photoelectric cell actuates the electrical control circuit asis more fully described hereinafter. However, as will be understood byone skilled in the art, a sonically controlled switch, a pressureswitch, or other actuator may be used in place of the photoelectriccell.

Referring to FIGURE 2, a conveyor belt 84 is supported on a plurality ofrollers 86 which are journalled to a conveyor 'frame 88. The conveyor 26is positioned directly beneath frame extension 58 and moves transverselyto the longitudinal axis of extension 58 to carry bundles into positionfor placement of the topwrap sheet 30.

As shown in FIGURES 6, 7, and 8, a labeling or addressing mechanism 90may be incorporated into the topwrap apparatus of the invention. Aplaten 92 is supported by a pair of flanges 93 each fastened to one of apair of support arms 94 which extend from the apparatus frame adjacentto the power roll 22. A bifurcated frame 96 extends from platen platform92 and carries a printing head 98 pivotally suspended on an axle 100extending between the arms of frame 96. The printing head 98 is actuatedby solenoid 102, although a pneumatic or other type actuator can beused. A label roll 104 carrying a continuous strip of labeling material106 is rotatably supported on an axle 108 fastened between the arms offrame 96.

In this embodiment of the invention, wrapper strip 20 is threaded undertensioning bar 54 around guide roll 50 as previously described. To feedthe strip 20 through the labelling or addressing mechanism 90, it isthreaded around a first guide bar 110, over platen 92, and under asecond guide bar 112 all positioned between arms 94. The strip 20 isthen fed between power roll 22 and follower roll 56. The actuation ofprinting head 96 by the printing head solenoid 102 serves to affix astrip of labeling material 106 to wrapper 22 just prior to the severingof wrapper 22 into a topwrap sheet 30. The printing head 96 prints anaddress or other information on the strip of labeling material 106 atthe same time that it afiixes it to wrapper 22; however, the labellingmaterial 106 may be pre-printed with an address or other information,and the action of printing head 98 may serve only to afiix strip 106 towrapper 20.

The operation of the topwrap apparatus can best be described inconjunction with a description of the control circuitry shownschematically in FIGURE 9. To begin the cycling of the machine, topwrapstrip 20 is threaded under tensioning bar 54 and over power roll 12 ashereinahove described. By pressing the start switch (FIG. 9), power issupplied to the control circuit of the apparatus. The machine will cycleonce since the normally open contacts in the bundle sensor relay (BS)are closed until the photocell light source 82 is activated. At the sametime, the conveyor 26 with bundles 32 spaced thereon is put into motion.As the first bundle 32 breaks the beam from the light source 82, thebundle sensor relay (BS) is actuated, and normally opens contacts BS-lclose actuating cycle relay (ICR) and timer (4TR). The bundle sensorrelay (BS) remains energized until the photoelectric beam isre-established. The cycle relay (1CR) remains energized with itsnormally open contacts 1CR-1 closed until the end of the apparatuscycle. Timer (4TR), after a short delay to allow energization of cyclerelay (1CR),

opens cont-acts 4TR-1. Contacts 4TR-1 are held open by timer (4TR) untilthe photoelectric beam is re-established, at which time timer (4TR)resets substantially instantaneously. Thus, as will be seen from FIGURE9, further cycling of the machine is prevented until .a previous cycleis completed and the photoelectric beam is re-established.

The closing of the contacts lCR-l energizes the coil of Agastat timer'(1TR). The Agastat timer, manufactured by the Elastic Stop NutCorporation of America, Elizabeth, New Jersey, is electrically operatedbut the speed at which the solenoid core moves to actuate the contactstherein is adjustably controlled by a pneumatic valve. As the solenoidcore in timer (1TR) moves, the normally closed but held open contacts1TR-"1 are allowed to close (preferablyfafter a delay of 510milliseconds for reasons explained hereinbelow) energizing the coil ofrelay (ZCR). Normally open contacts 2CR-1 and 2CR-2 in relay (2CR) closeand energize paper cutter solenoids 60 (FIGURES -1 and 3) and, whereused, printing head solenoid 102 (FIGURE 7). Thus, onetopwrap sheet isformed in place on support bars 24a, 24b and, where desired, an addressor a label is affixed to the portion of wrapper strip which will form asucceeding topwrap sheet.

As the solenoid core in timer (1TR) completes its travei, normallyclosed contacts 1TR-2 open and deenergize the coil of relay '(ZCR). Thecontacts of relay (2CR) open, de-energizing the cutter solenoids 60 and,when used, the printing head solenoid 102, allowing the papercuttler.,28 and the printing head 98 to return to their rest positions(FIGURES 3 and 7). The normally open contacts 1-TR-3 close as thesolenoid core in timer (1TR) completes its travel energizing the coil ofAgastat timer (2TR).

As the solenoid core in timer (ZTR) begins to move, it actuates-(desirably after a brief delay of -20 milliseconds) ;the normallyclose-d but held open contacts 2TR-1. These close, energizing the coilof the pneumatic cylinder valve solenoid (FIGURE 9) causing piston 38and attached placement plate 40 to move downward carrying the topwrapsheet into position atop bundle 32.

The 10-20 millisecond delay before actuation of the piston 38, isdesirable since it allows the paper cutter bumper 62 time to move awayfrom the. topwrap sheet 30 (FIGURE 3 to prevent snagging as the topwrapsheet 30 is temporarily deformed, and pushed through the support bars24a, 24b by placement plate (FIGURES 3 and 4). As the solenoid core intimer (ZTR) completes its travel, the normally closed contacts 2TR-2open deenergizing the coil of the pneumatic cylinder valve solenoidreturning piston 38 and attached placement plate 40 to their restpositions (FIGURES). At the same time the normally open contacts 2TR-3in timer (2TR) close energizing the coil of Agastat timer (3TR) As thesolenoid core in timer (STR) moves, it actuates the normally closed butheld open contacts 3TR-1 which close, energizing the coil of feed motorrelay (M) and closing contacts 1M, 2M, and 3M. The feed motor, which isconnected to power roll 22, starts and feeds wrapper strip 20 across thesupport bars 24a, 24b. After a short period of solenoid core travel(preferably in the order of /2 second) during which wrapper strip is fedacross the length of support bars 24a, 24b, the solenoid core opensnormally closed contacts 3TR-2 and 3TR-3, respectively de-energizing thecoils of feed motor relay (M) and relay (1CR). The feed motor stops andthe contacts lCR-l of relay (1CR) open, de-energizing the coils oftimers (1TR), (2TR), and (3TR) which reset substantially instantaneouslyfor the next apparatus cycle.

As hereinabove noted, a delay of 5-10 milliseconds is preferablyprovided before actuation of relay (ZCR) which energizes the papercutter solenoids 60. This short delay allows the feed motor to coastbefore the next topwrap sheet 30 is severed, assuring that a full lengthof wrapper strip 20 is extended across the support bars 24a, 24b betweenthe cycles.

As will be understood by one skilled in the art, the functions of one ormore of the timers and relays of the control mechanism describedhereinabove may be performed by appropriate limit switches actuated bymovement of the apparatus parts and/ or of the wrapper as it is fed, cutand placed on a bundle.

Thus, the topwrap apparatus of the present invention exhibits numerousadvantages in comparison to prior art machines. The use of a continuousroll of wrapper simplifies loading, and enables topwrap sheets to be cutas needed, thus, eleminating the expense of pre-cutting and stacking.The continuous strip of wrapper material is fed by a simple combinationof rollers, and any possibility of inadvertently feeding multiple sheetsis eliminated. Moreover, only a simple pair of support bars are requiredto position the sheets for placement on a bundle. The apparatus of theinvention is electrically controlled for fully automatic operation and,where desired, addresses or labels can be automatically applied to eachtopwrap sheet prior to its placement on a bundle."

It will thus be seen that the objects set forth above, among those madeapparent from the preceding description, are efficiently attained and,since certain changes may be made in the above construction withoutdeparting from the scope of the invention, it is intended that allmatter contained in the above description or shown in the accompanyingdrawings, shall be interpreted as illustrative and not in a limitingsense.

It is also to be understood that the following claims are intended tocover all of the generic and specific features of the invention hereindescribed, and all statements of the scope of the invention, which, as amatter of language, might be said to fall therebetween.

Having described my invention, what I claim as new and desire to secureby Letters Patent is:

1. An apparatus for placing topwrap sheets on bundles comprising, incombination:

(A) means for feeding a continuous strip of wrapper material,

(B) a cutter adjacent the path of travel of said strip for severing saidstrip to form a topwrap sheet,

(C) opposed and spaced supports positioned below said path of travel tosupport said severed topwrap sheet inwardly from its edges and inalignment with the upper surface of one of said bundles,

(D) a reciprocable placement plate positioned over said supports fortemporarily deforming said topwrap sheet -and carrying it through saidsupports to the upper surface of one of said bundles,

(E) a conveyor for continuously moving said bundles into position forreceipt of said topwrap sheet, and

(F) a control mechanism for guiding said apparatus through apredetermined cycle comprising means for actuating said mechanism inresponse to passage of said bundles over said conveyor, means forsequentially actuating said cutter, said placement plate and saidfeeding means in coordination with the passage of said bundles over saidconveyor to cut and place a topwrap sheet on each said bundle, and meansfor preventing the recycling of said apparatus until a previous cycle iscompleted.

2. An apparatus as defined in claim 1 wherein said supports comprise:

(A) a pair of substantially parallel support bars,

(1) spaced apart less than the width of said severed topwrap sheet butmore than the width of said placement plate, and

(2) positioned symmetrically under said placement plate to align saidtopwrap sheet with the upper surface of one of said bundles.

3. An apparatus as defined in claim 1 and further including meansadjacent the path of travel of said strip for producing tension andaccumulating slack in said strip to minimize the danger of tearingduring the feeding thereof.

4. An apparatus as defined in claim 1 and further including labellingmeans positioned adjacent to and traversing the path of travel of saidstrip for affixing printed matter thereto.

5. An apparatus as defined in claim 4 wherein said labelling meanscomprises:

(A) a printing head positioned over the path of travel of said strip;

(B) a platen positioned under said printing head below the path oftravel of said strip;

(C) means feeding labelling material between said printing head and saidstrip; and

(D) means actuating said printing head toward said platen to affix saidlabelling material to a portion of said strip;

said labelling means being positioned to act on said strip portion priorto severance thereof by said cutter into topwrap sheet.

6. An apparatus for placing topwrap sheets on bundles comprising, incombination:

(A) means for feeding a continuous strip of wrapper material,

(B) a cutter adjacent the path of travel of said strip for severing saidstrip to form a topwrap sheet,

(C) opposed and spaced supports positioned below said path of travel tosupport said severed topwrap sheet inwardly from its edges and inalignment with the upper surface of one of said bundles,

(D) a reciprocable placement plate positioned over said supports fortemporarily deforming said topwrap sheet and carrying it through saidsupports to the upper surface of one of said bundles,

(E) a conveyor for continuously moving said bundles into position forreceipt of said topwrap sheet, and

(F) electrical control circuitry for guiding said apparatus through apredetermined cycle comprising (1) bundle sensing means responsive topassage of said bundles over said conveying means,

(2) cycle switching means activated by said bundle sensing means,

(3) recycle timing means actuated by said bundle sensing means toprevent the recycling of said apparatus until a previous cycle iscompleted,

(4) cutter timing means responsive to actuation of said cycle switchingmeans for sequentially activating a first plurality of switches,

(a) said cutter timing means being adjustable to provide a predetermineddelay before the actuation of each of said first plurality of switches,

(5) cutter switching means, responsive to actuation of a first of saidfirst plurality of switches to actuate said cutter to form a topwrapsheet, and responsive to actuation of a second of said first pluralityof switches to return said cutter to its rest position,

(6) placement plate timing means responsive to actuation of a third ofsaid first plurality of switches for sequentially actuating a secondplurality of switches,

(a) said placement plate timing means being adjustable to provide apredetermined delay before actuation of each of said second plurality ofswitches,

(b) a first switch of said second plurality of switches being adapted toactuate said placement plate,

(c) a second switch of said second plurality of switches being adaptedto return said placement plate to its rest position,

(7) feed timing means responsive to actuation of a third switch of saidsecond plurality of switches to actuate a third plurality of switches,

(a) said feed timing means being adjustable to provide a predetermineddelay before actuation of each of said third plurality of switches,

(b) a first switch of said third plurality of switches being adapted toenergize said feeding means and extend a predetermined length of saidstrip over said supports,

(c) a second switch of said third plurality of switches being adapted tode-energize said feeding means, and

(d) a third switch of said third plurality of switches being adapted tode-activate said cycle switching means.

7. An apparatus as defined in claim 6 and further including a labellingmechanism positioned adjacent the path of travel of said strip, andmeans for actuating said mechanism substantially simultaneously withactuation of said cutter to affix printed matter to said strip.

8. An apparatus for placing topwrap sheets on bundles comprising, incombination:

(A) means for feeding a continuous strip of wrapper material,

(B) a cutter adjacent the path of travel of said strip for severing saidstrip to form a topwrap sheet,

(C) opposed and spaced supports positioned below said path of travel tosupport said severed topwrap sheet inwardly from its edges and inalignment with the upper surface of one of said bundles,

(D) a reciprocable placement plate positioned over said supports fortemporarily deforming said topwrap sheet and carrying it through saidsupports to the upper surface of one of said bundles,

(E) a conveyor for continuously moving said bundles into position forreceipt of said topwrap sheet, and

(F) a control mechanism for guiding said apparatus through apredetermined cycle comprising (1) means for actuating said mechanismresponsive to passage of said bundles over said conveyor,

(2) first delay means for delaying actuation of said cutter subsequentto actuation of said mechanism,

(3) means for actuating said cutter subsequent to said first delay,

(4) second day means for delaying actuation of said placement platesubsequent to actuation of said cutter,

(5) means for reciprocation of said placement plate subsequent to saidsecond delay,

(6) means for actuating said feeding means subsequent to reciprocationof said placement plate, and

(7) means for preventing the recycling of said apparatus until aprevious cycle is completed.

9. An apparatus for placing topwrap sheets on bundles comprising, incombination:

(A) means for feeding a continuous strip of wrapper material,

(B) a cutter adjacent the path of travel of said strip for severing saidstrip to form a topwrap sheet,

(C) opposed and spaced supports positioned below said path of travel tosupport said severed topwrap sheet inwardly from its edges and inalignment with the upper surface of one of said bundles,

(D) a reciprocable placement plate positioned over said supports fortemporarily deforming said top wrap sheet and carrying it through saidsupports to the upper surface of one of said bundles, and

(E) means for loading a roll of said wrapper material comprising (1) aroll compartment having a floor and sidewalls, (2) a ramp pivotallyconnected to and extending from said floor between said sidewalls, (3)guide means adjacent said sidewalls in position to receive said rollwhen pushed up said ramp, and

(4) roll supports positioned adjacent said guide 1 References CitedUNITED STATES PATENTS 0 TRAVIS S. McGHEE, Primary Examiner.

US. Cl. X.R.

Patent No.

Inventor(s) Dated James Harrison November L 1970 It is certified thaterror appears in the above-identified patent and that said LettersPatent are hereby corrected as shown below:

Column 2, line 44 "theh" should be the;

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